Rock-crusher.



J. R. FOGG.

ROGK CRUSHER.

APPLIoATIoN FILED JUNI'. zo. 1907. I

Patented Nov. 24, 1908.

2 SHEETS-SHEET 1.

@How m34 I 51m/wanton- JAMES ROBINSON FOGG, OF KENE'IT SQUARE, PENNSYLVANIA.

ROCK-CRUSHER.

Specification of Letters Patent.

Patented Nov. 24, 1908.

Application led June 20, 1907. Serial No. 379,961.

To all whom 'ii may concern:

lle it known that I, Jannes lloxnxsox Foco, a citizen of the United States. residing at Kennett Square, in the county of Chester and State of Icnnsylvania7 have invented certain new and useful Improvements in Rock-Crushers; and I do hereby declare the followingl to be a full7 clear, and exact dcscription of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

lWIy invention relates to rock crushers and particularly to the manner of operating the swinging jaw.

It aims to effect the crushing of the rock at a less expense of power and in such a way as to decrease the strain upon the machine and especially upon the lever for operating the swinging aw.

Another object is to facilitate the feeding' of the rock between the jaws.

The invention consists of the features of construction and combinations of parts hereinafter described and specified in the claims.

In the accompanying' drawings, illustrating the preferred embodiment of my invention: Figure 1 is a side elevation of the machine. Fig. 2 is a longitudinal vertical section. Fig. 3 is a plan view, and Fig. 4 is a front elevation partly in section.

Referring more particularly to the drawing, l designates the side plates of the machine between which the fixed or stationary jaw 2 is bolted and which has grooves 3 formed therein to accommodate tongues or ledges on said fixed jaw whereby Athe bolts are saved from all strain. The swinging jaw 4 is mounted at its upper end on a shaft 5 extending between the side plates. The inner face of said swinging jaw above the die is convex so that there is no place for loose pieces and dust to collect as is the case when it is concave.

The lever (i for actuating the swinging jaw is mounted at its upper end on an eccentric revoluble shaft 7 also having bearings in the side plates. Said lever bears near its lower end upon a roller 8 preferably made of cast iron mounted upon a babbitted or bronze shaft 9. Said roller has a plurality of oil passages or compartments 10 closed by screw plugs 10a. Said oil compartments are distributed around said roller whereby it may always he kept thoroughly lubricated.

It is arranged nearly on a level with the toggle ll but a little above the end of the lever so that said lever acts as a crow bar with the roller as a fulcrum and thereby accomplishes the maximum amount of work. s the eccentric shaft to which the upper end of said lever is pivoted is arranged behind the vertical plane of the axis of the roller bearing, said lever is disposed on an incline and rests upon said roller bearing above its horizontal axis. By arranging said lever on an incline, the desired crow bar action is obtained and the strain on the lever reduced to a minimum. Drive wheels l2 are mounted on the eccentric shaft and a spring pressed rod 13 serves to retract the swinging jaw after each forward movement.

My invention is a great improvement over the old form of machine in which the operating lever is pivoted at its lower end and also over the form having vertically movable pendulum arms. I have found from practical experience that the pivot shaft in the first of these old constructions is subjected to so much strain that it soon wears out and causes a great deal of trouble to replace it. In my construction the greatest strain comes upon the loose roller bearing S which may be kept well oiled, and which will revolve under the action of the lever so that the wear will be evenly distributed. Said roller will accordingly last for a considerable time and when necessary may be easily replaced by knocking out the shaft on which it is mounted without interfering with the. lever which may be simply propped up out of the way while the change is being made.

rl`he main defect in the type of machine employing a vertically movable pendulum arm is that the strain comes at weak places, namely on the caps over the eccentric shaft with the result that said caps are frequently broken olf. My construction also overcomes this objection as the strain is only on the cap 14 when the lever is on its back stroke and even then it is relieved by the retracting rod.

I claim:

l. In a rock Crusher, the combination, with a lixed aw, of a swinging jaw pivoted at its upper end, and an inclined operating lever having its upper end mounted on an eccentric shaft and its lower end having bearing connection with said swinging j aw, the bearing of said lever around said eccentric shaft conforming Lo the shape ol said shaft, said Conforming to the shape of said shaft, Suid lever resting upon n` fulcium bearing at a lever resting upon u roller ulerum bearing point intermediate of its end. at L pointintei'mediate of its ends.

2. In L rock c1us11e1,tlie co11ibinatioi1,\vitli In .testimony whereof, affix my signa- 5 a xed j aw, of n swinging jaw pvoted at its ture, 1n presence of two WltIleSSeS.

upper end7 and an inclined operating lever JANIES ROBINSON FOGG having its upper end mounted on an eecentric Shaft und its lower end having bearing VitnesSeS: connection with Said Swinging j aw, the bear- SAMUEL LACKLEN, J 1., 10 ing` of said level' around said eccentric shaft J. CLARENCE FOGG. 

